He says the tunnel was under Route 1, connecting from the Endicott farm (east of Route 1) to property just below the Danvers State Hospital, in a low, nearly wetland (pasture), that seemed to be on or near the lowest portions of the original Watson Farm, west of Route 1.
Some years ago, from memory, he had drawn a sketch of the tunnel. I saw his sketch for the first time on October 19, 2017. He says it is not drawn to scale.
|Rob drew yellow line for cow tunnel position; looking north.|
The 1948 plans show a "Cattle Pass " under Rt. 1 exactly where Rob had marked "cow tunnel" on the Google Earth image.
|1948 plan with Cattle Pass; looking south.|